The sigma subunit of bacterial RNA polymerase . a. recognizes transcription termination sites in the DNA b. contains the catalytic activity of the polymerase c. recognizes promoter sites in the DNA d. remains part of the polymerase throughout transcription

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during the process of dna replication, brdu can replace thymidine and incorporate into the newly synthesized dna, cell proliferation thus can be reflected in the extent of brdu incorporation.

photosynthesis makes the glucose that is used in cellular respiration to make atp. the glucose is then turned back into carbon dioxide, which is used in photosynthesis. while water is broken down to form oxygen during photosynthesis, in cellular respiration oxygen is combined with hydrogen to form water.